package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo {
    public static void main(String[] args) throws IOException {
       FileInputStream fis=new FileInputStream("./file1.jpg");
       FileOutputStream fos=new FileOutputStream("./file3.jpg");
       long start=System.currentTimeMillis();
       int d;
       while ((d=fis.read())!=-1){
           fos.write(d);
       }
       long end=System.currentTimeMillis();
        System.out.println("耗时了"+(end-start)+"ms");
       fis.close();
       fos.close();
    }
}
